Which hazard class includes Flammable Solids; Substances Liable to Spontaneous Combustion; Substances That React With Water Emit Flammable Gases?

• A. Class 7 Hazards
• B. Class 5 Hazards
• C. Class 8 Hazards
• D. Class 4 Hazards

Answer: (D)

You're being tested on recognizing which hazard class covers flammable solids, substances liable to spontaneous combustion, and materials that emit flammable gases when they contact water. The hazard class that explicitly includes all three of these is the one designated for flammable solids, self-heating substances, and water-reactive materials that release flammable gas. That alignment makes it the correct choice because it directly matches the described properties. The other options describe different categories—radioactive materials, oxidizers/organic peroxides, and corrosives—so they don’t fit the listed characteristics.